child support calculator

Overview: We have created an Excel workbook with 10 sheets that interact to calculated child support payments. We would like to have this converted into an executable(.exe) that has a very nice Windows GUI. Specifics: 1)Programming language is not an issue. Use whatever is quickest or easiest for you. 2)We must have two versions; one that expires after 30 days with a hidden byte in the registry so that a reinstall will be of no help. 3) Since the child support laws change from time to time it is imperative that a back door be built that allows us to change calculations, constant values, and percentages. 4)We will also need a very simple, but attractive website to purchase from. This site should allow for user registration and payment by credit card or PayPal. Once registered and credit card or Paypal is verified they may then download the live version however many times they wish but only one download per login (the eval version is free after they register). ## Deliverables Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. Complete copyrights to all work purchased. Payments may be segmented per negotiations ## Platform Windows with the future possibility of Palm or Windows CE in the near future. ## Deadline information The forty five day eval version is due by 7/31/02. The unlimited copy must be available by 8/15/02. Web Site by 8/30/02 Bonuses may be available for early finish.